203490 has 96 divisors (see below), whose sum is σ = 673920. Its totient is φ = 41472.

The previous prime is 203461. The next prime is 203531. The reversal of 203490 is 94302.

203490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

203490 is a nontrivial binomial coefficient, being equal to C(21, 8).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

203490 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10701 + ... + 10719.

It is an arithmetic number, because the mean of its divisors is an integer number (7020).

2²⁰³⁴⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336960).

203490 is an abundant number, since it is smaller than the sum of its proper divisors (470430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203490 is a wasteful number, since it uses less digits than its factorization.

203490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 203490 is about 451.0986588320. The cubic root of 203490 is about 58.8185558540.

Adding to 203490 its reverse (94302), we get a palindrome (297792).

The spelling of 203490 in words is "two hundred three thousand, four hundred ninety".